Fluidized bed furnace

Details Fluidized bed furnace Fluidized bed furnace

F - Mech Eng,Light,Heat,Weapons

27

B

110/15

F27B 15/00 (2006.01) B01J 8/38 (2006.01) F23C 10/10 (2006.01)

Patent

CA 1320661

ABSTRACT A fluidized bed furnace, used for example in the heating of boilers, has re-introduction of solids and includes a cyclone separator which is connected with its solids exit to a fluidized bed by a siphon and a gravity chute to which a raw coal feeding duct is connected. An intermediate member connects the exit of the siphon with the gravity chute. The cross-sectional area of the intermediate member firstly increases, starting on the siphon, and subsequently decreases to the cross-sectional area of the gravity chute. The raw coal feeding duct is positioned above the enlarged cross-sectional area of the intermediate member. The enlargement of the intermediate member together with the addition of raw coal to the solids within the intermediate member provides for stratification of the raw coal on top of the solids, thereby preventing caking of the raw coal onto the horizontal walls of the intermediate member and the gravity chute. PAT 13843-1

612822

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